57.努力练习 practice very hard
56. 放风筝 fly a kite
55.打羽毛球 play badminton
54. 划船 row a boat
53.去年 last year
52. 在过去 in the past
51.能做某事be able to do sth (have the ability to do sth)
50.对某人表示感激 be grateful to sb
49.过街 cross the street
48.跌倒 fall down